Prevention of zinc deficiency in crops

Zinc is an indispensable trace element for crop growth. Zinc deficiency can cause dwarfing of plants, short internodes, inhibition of leaf expansion and elongation, and appearance of leaflets with twisted and wrinkled edges. Alzheimer's corn seedlings and rice seedlings are caused by zinc deficiency. There are four methods for preventing and treating zinc deficiency in crops: 1. Seed dressing: Dissolve zinc sulfate in a small amount of water, stir well, and mix it with seeds. Let it dry after sowing. 2. Soaking: soaking with zinc sulfate solution, corn can be soaked for 6~8 hours, the solution concentration is 0.02%~0.05%; rice can be soaked for 12 hours, the solution concentration is 0.1%. 3. Foliar spraying: 0.1% zinc sulfate can be sprayed immediately after the occurrence of zinc deficiency symptoms in the early stage of crop growth, and sprayed once every 7-10 days. 4. Soil application: Mixed with other fertilizers as base fertilizer, the dosage is 1~3 kg/mu, pay attention to uniform application.

Epichlorohydrin (ECH)

Epichlorohydrin, 3-Chloro-1, 2 - epoxypropene, chloropropylene oxide ,ECH .

Molecular Formula: CH2OCHCH2Cl, C3H5OCl

Properties: It is a volatile, unstable colorless liquid with irritating odor similar to chloroform and ether. Molecular weight is 92.85, density, 1.1806g/cm3, boiling point, 116.11°C, freezing point, -57.2°C, refractive index (nd20), 1.4382, flash point (open cup), 40.6°C, and ignition point, 415°C. It is slightly soluble in water, miscible with many organic solvents, and able to generate azeotrope with a variety of organic liquids.

Main Applications:
Epichlorohydrin is an important organic industrial chemical and a chlorine-consuming product in fine chemicals, mainly for producing epoxy resin, synthetic glycerin, epichlorohydrin rubber, nitroglycerine explosives, glass fiber reinforced plastics, and electrical insulation products, which are widely used in the chemical industry, light industry, transportation, medicine, electronics and other fields. It also can be used as solvent for cellulose ester, resin, and cellulose ether, and the raw material of plasticizer, stabilizer, surfactant, and chloroprene rubber.

Toxicity and Protection: It is highly toxic, absorbed through the skin, and irritating to skin and mucous membranes. In higher concentrations, it has the function of narcotism. When poisoning occurs, there will be eye irritation, conjunctivitis, rhinitis, lacrimation, cough, fatigue, gastrointestinal disorders, nausea and other symptoms. Serious poisoning may lead to anesthesia or even lung, liver or kidney damages. Lethal concentration of human beings is 20ppm. Lethal dose of rat is 5090mg/kg. The maximum allowable concentration in air is 5ppm (18mg/m3). Production equipment needs to be closed, air, circulating, and the operator, wear protective equipment. In addition, due to intense auto polymerization, epichlorohydrin can not be heated in the fire in case of container burst. As for reaction as reagent, it is appropriate to be diluted with inert solvent and slowly added.

Packaging, Storage and Transport:
As ferric chloride or stannic chloride can promote auto polymerization, epichlorohydrin should be stored in dry, clean iron barrel, 200kg each, and kept in a cool, ventilated, and dry place, away from fire and heat. Store and transport in accordance with the provisions of flammable toxic substances.

EPICHLOROHYDRIN SPECIFICATION DATA SHEET

ITEMS	GUARANTEED SPEC
PURITY% (m/m)≥	99.9
DENSITY g/cm3	1.180-1.183
COLOR(pt-co)≤	10
MOISTURE%(m/m)≤	0.05

Epichlorohydrin (Ech),Epichlorohydrin 106-89-8,99.9% Epichlorohydrin,High Quality Epichlorohydrin

Shandong Tiancheng Chemical Co., Ltd. , https://www.akdchemical.nl